C preserved bone because none of the others were enough
Most of the worlds fossil fuels are made up of Coal.
Answer:
mitosis
Explanation:
Mitosis is when a cell divides.
The main responsible for the delay among the atrial and
ventricular contractions is the action potential conduction velocity of the AV
node cells. If the atria and ventricles contract simultaneously, atria cannot
give any help in filling the ventricles, which is needed, especially in those
with stiff ventricles as in the elderly. Hence atria have to contract first and
then the ventricles.
Answer:
The answer is double replacement :)